My first foray into filters and I'm excited to use this beyond testing indoors and out in direct daylight. The filter comes in a plastic case, which I appreciate. The lens fits great on my Nikon and I love how it's a variable filter, so you're able to shift the lens to create a more dense filter effect along with a wide range of stops. Pretty happy overall and I'm pretty sure this will be a main driver during the summer.

This is my first experience using a Neutral Density filter, let alone a variable one, so I don't pretend to be an expert. I haven't had time to really play with this filter either; I just took a few quick shots to see what it does. However, I am impressed with this filter. It is clearly a very high quality filter. Even though this filter can be adjusted from ND2 (1 stop) to ND2000 (11 stops),l the frame is very thin and is made of high grade machined aluminum. The filter is adjusted by turning the outer ring; there are eleven marks to indicate the amount of adjustment, and the adjustment ring moves very smoothly with adequate resistance. The filter is made of multi-coated glass to reduce glare and other anomalies. On my 18-35mm lens, the lens hood will not fit with the filter installed, and neither will the lens cap. The three attached photos show how the filter can be used to reduce the amount of light. The three shots are from the minimum setting to the middle setting; all camera settings are the same except for the shutter speed. I tried some shots at higher filter settings, but the effect was too great (at least given my limited knowledge). While I still have a great deal to learn about using this filter effectively, clearly it has a great deal of potential. This is a precision device at a price that is much less than some other brands I have looked at.

I shoot a lot of video with different lenses, and lately have been using my 24 f1.4 Sony lens quite a bit while outdoors, and this can be a very bright lens, so using a variable ND filter like this one by K&F can definitely be useful and a big help to shoot with low apertures and further blur out my backgrounds nicely. I didn't notice any real color shifting, and my image has remained sharp as expected. I like that this one is so variable and allows me to use just this one filter, rather than having to keep changing them out to different ones and the light changes. It's just more useful. I'm thankful this one came with that little plastic storage case, rather than a pouch or something useless, because it helps me to protect the filter when not in use. This is a nice inexpensive alternative to much more expensive ND filters and it's actually quite nicely made.